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Table 1 Summary of patient’s demographic data

From: Posterior pedicle screw fixation to treat lower cervical fractures associated with ankylosing spondylitis: a retrospective study of 35 cases

Variables  
Sex (F/M) 1/34
Age (mean, yrs) 57
Mechanism of injury
 Low-energy 25
 High-energy 8
 Unknown 2
Level of fracture
 C5–6 11
 C6 5
 C6–7 16
 C7 3